Earl's Performance Aluminum AN O-Ring Seal Weld Fittings

Earl's Performance AN O-Ring Seal Weld Fittings are precision-machined components built for fabricators, professional race teams, and performance enthusiasts who demand leak-free reliability in custom plumbing systems. Machined from 6061 bare aluminum, these weld-in bung fittings deliver an outstanding strength-to-weight ratio and are engineered to handle the rigors of fuel, oil, coolant, and hydraulic applications across motorsport and street performance builds alike.

Key Features:

• 6061 Aluminum Construction — Precision-machined from high-grade 6061 bare aluminum for exceptional strength, corrosion resistance, and minimal weight in performance and race applications
• O-Ring Seal Interface — The straight-thread O-ring sealing design provides a reliable, leak-free connection under demanding operating pressures, offering superior sealing performance over traditional tapered-thread fittings
• Weld-In Bung Design — Engineered for permanent, clean installation directly into fuel cells, oil pans, reservoirs, custom tanks, and fabricated components, delivering a professional factory-quality finish
• AN Standard Threads — Army-Navy specification threading ensures broad compatibility with industry-standard hose ends, adapters, and plumbing hardware throughout any custom system
• Versatile Application Range — Suited for fuel systems, oil systems, coolant lines, and hydraulic plumbing across racing, hot rod, and high-performance street builds
• Multiple Configurations Available — Offered across a range of AN sizes and thread configurations to accommodate virtually any custom plumbing requirement
• Made in the USA — Manufactured to strict quality standards consistent with Earl's Performance's long-standing reputation as a leader in performance plumbing

About Earl's Performance: Earl's Performance Plumbing has been bringing aviation-grade fluid transfer technology to the automotive performance market for over five decades. Founded by Earl Fouts in 1955 in Lawndale, California, the company's original mission was to supply high-quality military aircraft surplus plumbing components directly to the racing industry. These AN O-Ring Seal Weld Fittings carry that same heritage of precision engineering, making them the trusted choice for any serious build.